Isobutyl magnesium bromide with dry ether and absolute alcohol gives

How many $1,2$-shifts of carbocation intermediate are involved during the course of following reaction:

Find out total number of reagent.set of reagent used in the following conversion.

(1) ${\mathrm{H}}^{+}/\mathrm{\Delta }$

(2) conc. ${\mathrm{H}}_2{\mathrm{SO}}_4/\mathrm{\Delta }$

(3) ${\mathrm{H}}_3{\mathrm{PO}}_4/\mathrm{\Delta }$

(4) ${\mathrm{KHSO}}_4/\mathrm{\Delta }$

(5) ${\mathrm{Al}}_2{\mathrm{O}}_3/350°\mathrm{C}$

(6) ${\mathrm{PBr}}_3$

(7) ${\mathrm{SOCl}}_2$

 number of possible products.

The number of possible di-Bromo products formed when the major product $\mathrm{A}$ treated with ${\mathrm{Br}}_2/{\mathrm{CCl}}_4$ :

The number of reagents is used for given conversion.

(1) $\mathrm{Zn}-\mathrm{Hg}/\mathrm{HCl}$

(2) ${\mathrm{N}}_2{\mathrm{H}}_4/{\mathrm{OH}}^{-}$

(3) ${\mathrm{N}}_2{\mathrm{H}}_4/{\mathrm{H}}_2{\mathrm{O}}_2$

(4) 

(5) ${\mathrm{LiAlH}}_4$

(6) ${\mathrm{NaBH}}_4$

(7) ${\mathrm{BH}}_3/\mathrm{THF}$